MSNBC reporting that the justice department asked the CIA 11 questions in response to the CIA request for an investigation.
The CIA affirmed that Plame's status was classified, that whoever leaked it wasn't authorized to do so, and that the news media would not have been able to guess her identity without somebody with access to classified information illegally leaking it to them, and that the act was criminal. Oh, and the 11 answer response from the CIA with fleshed out details is now classified secret (not secret enough for somebody to leak that to MSNBC though)
When you say they said "guess her identity" I presume you mean as a CIA "operative", not Wilson's wife, which was widely known.
We'll see, but Cliff May said today the question is "who didn't know" she worked for the CIA.
I wouldn't be so quick to swallow MSNBC's representations. They are already reforming their initial reports (Andrea Mitchell).